A Conductivity Probe as a Dose Feedback Loop
Conductivity tracks ions, not organic load, and a fouled probe drifts toward over-dosing. How to use it as a trend alarm and where feedback control fails.
Making Slurry With Leachate Instead of Mains Water
Pre-hydrating polymer in leachate speeds the batch and cuts final capacity. Two competing mechanisms, when each matters, and a bucket test to settle it.
Green Roof Substrate at 120 mm: Dosing Gel Where Weight Is the Limit
A 120 mm extensive roof has about 10 kg per square metre of spare load, and full-rate gel needs 26. Why zoning the dose beats treating the whole roof.
Free Chlorine at 2 ppm: Recycled Irrigation Water and Gel
Free chlorine at 2 ppm softens gel at the emitter while salt load cuts absorption by a fifth. How to adjust dose and pre-swelling on recycled irrigation water.
Planting at 6 °C: How Cold Soil Rewrites the Dose
At 6 °C gel swells four times slower and the root zone stays wet for months. Why late-autumn doses should drop 25 percent and how to pre-swell first.
